How to sign a Word document
A Word file is easy to edit, which is exactly the problem when it's a contract: anyone can change a sentence after you've signed it. You can sign inside Word, but in most cases the better move is to save it as a PDF and sign that. Here are both, plus how to get a Word document signed by other people.
Updated November 5, 2026 · 3 min read
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Option 1: sign inside Word
Word has no sign button for an ordinary signature. Microsoft's own instructions are to insert a picture of your handwritten signature. You need an image of your signature first: sign white paper, scan or photograph it, and save it as a PNG or JPG, or make one with our free signature maker.
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Click where the signature goes
Put the cursor on the signature line of the document.
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Insert the picture
On Windows, select Insert > Pictures and choose the file. On a Mac, select Insert > Pictures > Picture from File, choose it and select Insert.
- 3
Trim and size it
Select the picture, open the Picture Format tab and use Crop to cut the empty paper around the ink, then drag a corner to size it to the line.
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Type the rest
Add your printed name and the date under the signature, then save. Word for the web has no signature command, so this picture method is the way there too.
If the sender added a signature line (it shows an X and a name under it), they may expect a digital signature. In Word for Windows, you sign that line with a digital ID, and Word then marks the document read-only. If you don't have a digital ID, ask the sender whether an ordinary signature is fine.
Option 2: turn it into a PDF, then sign
This is the safer route for anything with money or obligations in it, because a PDF doesn't reflow or invite edits the way a .docx does.
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Save a PDF copy
In Word, choose File > Save As (or Save a Copy) and pick PDF as the file type. On a Mac you can also choose File > Export. Open the PDF and check that nothing moved.
- 2
Sign the PDF
Use the free tool on your device: Preview on a Mac, Edge on Windows, or Markup on iPhone.
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Send the PDF back
Reply with the signed PDF, not the Word file, and say in your email that the PDF is the signed version.
When other people have to sign the Word file
If you wrote the agreement in Word and need a client's or partner's signature, don't email a .docx and hope it comes back unchanged. Save it as a PDF and send it for signature, so everyone signs the same fixed copy. Each send in SignMaster is an envelope: one or more documents going to one or more signers.
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Optional: type text tags in Word
Where a signature belongs, type a tag like {{signature:1}} for the first signer, {{date_signed:1}} beside it, or {{text:2:req}} for a required box for the second signer. When you upload, SignMaster offers to turn each tag into a field in that spot and hides the tag text.
- 2
Upload the PDF
Click New envelope and upload the PDF you saved from Word. Exporting to PDF yourself keeps your fonts and page breaks exactly as you laid them out.
- 3
Add signers and fields
Add each signer by name and email, in order. If you didn't use tags, place signature, initials, date signed and text fields by hand, or let Alana place them beside the signature lines.
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Send
Signers open an email link on any device, with no account. Everyone receives the signed PDF and its certificate of completion when the last person signs.
Tags that work
Tags can be signature, initials, date_signed, name, email, company, title, text, date, checkbox or phone, followed by the signer's number. Add :req to make a field required; signatures and initials always are.
Questions? Answers.
How do I sign a Word document without printing it?
Insert a picture of your signature with Insert > Pictures, or save the document as a PDF and sign it with Preview, Edge, Chrome or Markup. Either way, no printer or scanner is needed.
Is a signature pasted into Word legally binding?
It can be. Under the federal ESIGN Act, a signature can't be denied legal effect just because it's electronic. The weakness is that a Word file is easy to change after signing, and nothing records who inserted the picture.
What is the signature line in Word?
A placeholder that shows where to sign, with the suggested signer's name and title. In Word for Windows, signing it adds a certificate-based digital signature and makes the document read-only.
Should I send back the signed Word file or a PDF?
A PDF. It looks the same on every device and is much harder to edit without it being obvious. Keep your own copy of exactly what you signed.
Sources
- Microsoft Support, Insert a signature in a Word document · support.microsoft.com
- Microsoft Support, Add or remove a digital signature in Microsoft 365 files · support.microsoft.com
- 15 U.S.C. § 7001, ESIGN Act general rule and consumer consent (govinfo) · govinfo.gov